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Small-bowel mucosal biopsy demonstrates partial villous atrophy in some 70–80 per cent of patients with dermatitis herpetiformis discount 4mg cardura blood pressure medication viagra. This gut dis- order is best cardura 2mg blood pressure medication grapefruit juice, in fact purchase cardura australia arrhythmia upon exertion, a form of gluten enteropathy (as is coeliac disease) and can be improved by a gluten-free diet buy cardura discount prehypertension stress. Hepatic disease In severe chronic hepatocellular liver failure, hypoalbuminaemia occurs, which results in the curious sign of whitening of the ﬁngernails (Fig. These vascular anomalies consist of a central ‘feeding’ blood vessel (‘the body’) with numerous ﬁne radiating ‘legs’. Their cause is uncertain, but they may be related to the plasma levels of unconjugated oestrogens. In biliary cirrhosis, severe pruritus develops, resulting in excoriations and prurigo papules. Systemic causes of pruritus ● End-stage renal failure (uraemia) often causes persistent severe itch. For some curious reason, the itch may be a particular problem when these patients have a bath. Diabetics are prone to candidiasis, which causes perigenital itch, and it is possible that this is how the idea began. Summary ● Certain skin disorders are precipitated by an ● Necrolytic migratory erythema is a persistent, underlying malignancy. These include acanthosis erosive, migratory rash associated with excess nigricans, erythema gyratum repens, acquired glucagon secretion from a pancreatic alpha cell ichthyosis and necrolytic migratory erythema. Addison’s disease, caused by destruction of the ● Dermatomyositis, bullous pemphigoid and the adrenal cortex. Erythema gyratum repens androgenization (virilization), with increased limb is an odd erythematous rash with a ‘wood-grain’ and facial hair, seborrhoea and acne. It is seen in 5 per cent of ● Dermatitis herpetiformis is an autoimmune, itchy, thyrotoxic patients and is accompanied by blistering disease in which 70 per cent of patients exophthalmos. In this condition, persistent, irregular, ● White ﬁngernails due to hypoalbuminaemia and yellowish plaques occur on the lower legs. The degree of racial pigmentation does not depend on the number of melan- ocytes present, but on their metabolic activity and the size and shape of their melanin-producing organelles – the melanosomes. Melanocytes account for 5–10 per cent of the cells in the basal layer of the epidermis. Melanin synthesis is controlled by melanocyte-stimulating hormone and is inﬂuenced by oestrogens and androgens. Melanin is produced in melanocytes, but ‘donated’ via their dendrites to neigh- bouring keratinocytes. It is also a powerful electron acceptor and may have other uncharacterized protective functions. Excessive pigmentation is known as hyperpigmentation, and decreased pig- mentation is known as hypopigmentation. Affected individuals have a very pale or even pinkish complexion with ﬂaxen, white or slightly yellowish hair and very light-blue or even pink eyes. They are extremely sensitive to the harmful effects of solar irradiation and in sunny climates often develop skin cancers. In Hermanski–Pudlak syndrome, there is an associated clotting defect due to a plate- let abnormality. In several types of albinism, the abnormality of melanin synthesis is conﬁned to the eyes. The depigmented patches are often symmetrical, especially when they are over the limbs and face. Odd patterns sometimes occur, as when depigmented patches develop over the location of endocrine glands. The condition often starts in childhood and either spreads, ultimately causing total depigmentation, or persists, with irregular remissions and relapses. In halo naevus (Sutton’s naevus), the depigmentation of vitiligo begins around one or a few compound naevi. Pathogenesis and epidemiology Vitiligo occurs in 1–2 per cent of the population and is more common when it has occurred in other members of the family. It is also more common in diabetes, thyroid disease and alopecia areata, and appears to be due to an autoimmune attack on melanocytes. Case 21 Mohammed was aged 23 when he ﬁrst developed a sharply deﬁned, white area on his face. Treatment for Mohammed’s vitiligo did not seem to help a great deal, but, after several years, some of the patches repigmented spontaneously. It also detects the yellow- green ﬂuorescence in some cases of pityriasis versicolor. Hyperpigmentation It has to be determined whether the pigmentation is due to melanin or some other pigment (Table 20. Generalized melanin hyperpigmentation is seen in Addison’s disease due to destruction of the adrenal cortex from tuberculosis, autoimmune inﬂuences, meta- stases or amyloidosis. Pigmentation is marked in the ﬂexures and exposed areas, but the mucosae and nails are also hyperpigmented. The hyperpigmentation is due to an excess of pituitary peptides resulting from the lack of adrenal steroids. Generalized hyperpigmentation may be part of acanthosis nigricans (see page 283), which is much more marked in the ﬂexures and is accompanied by exaggerated skin markings and skin tags. The increased pigmentation is caused by both iron and excess melaninization in the skin. Generalized hyperpigmentation is also seen in cirrhosis, particularly biliary cirrhosis, chronic renal failure, glycogen stor- age disease and Gaucher’s disease. Drugs can cause generalized diffuse hyperpigmentation, patchy generalized or localized hyperpigmentation. Arsenic ingestion causes a generalized ‘raindrop’ pattern of hyper- pigmentation, and topical silver preparations cause ‘argyria’, producing a dusky, greyish discoloration of the skin and mucosae. Minoxycycline (Minocin) can cause darkening of the scars of acne; it can also produce dark patches on exposed areas. The pigment is a complex of iron, the drug and melanin and the condition is only partially reversible. Amiodarone, the antiarrhythmic drug, causes a char- acteristic greyish colour on exposed sites. The phenothiazines, in high doses over long periods, produce a purplish discoloration in the exposed areas due to the deposition of a drug–melanin complex in the skin. Carotenaemia produces an orange-yellow, golden hue due to the deposition of beta-carotene in the skin. It is seen in food faddists who eat large amounts of carrots and other red vegetables. Beta-carotene is also given for the condition of erythropoietic protoporphyria (see page 261). Canthexanthin is another carotenoid that produces a similar skin colour and was sold for this purpose to simulate a ‘bronzed’ suntan. Pigment crystals were found in the retina of patients taking the drug and it has been withdrawn for this reason.
Famciclovir (Famvir) lasts longer genital herpes 55 in the body than acyclovir buy generic cardura 2mg on-line connexin 43 arrhythmia, and the herpes patient should be reported to the registry (800-722-9292 purchase cardura with amex hypertension after pregnancy, takes only twice-daily doses order cardura 1mg amex hypertension images. Oral acyclovir may be taken by a woman who Recurrences has her ﬁrst episode of genital herpes during preg- It has been seen that people having six or more nancy purchase 4mg cardura with mastercard blood pressure zantac. Basically, though, the routine use of acy- episodes of herpes a year can reduce the rate of clovir during the pregnancy of a woman with recurrences by 75 percent by availing themselves recurrent infections is not recommended. The extent to disease; and 3 percent for those who have asymp- which this kind of therapy reduces the likelihood tomatic shedding. Abnormal strains seem more likely Understanding the circuitous route that herpes to ﬂourish in these individuals. By the same token, often takes is key to coming to grips with having a no increase in drug-resistant strains of herpes in the disease for which there is no cure. In per- For episodic recurrent infection: sonal relationships, having herpes can feel like having leprosy, and, unfortunately, once it is con- Acyclovir: 400 mg orally three times a day for ﬁve tracted, there is little one can do other than try to days, or suppress the symptoms and frequency of bouts Acyclovir: 200 mg orally ﬁve times a day for ﬁve and take an honest approach with prospective days, or sexual partners. Famciclovir: 125 mg orally twice a day for ﬁve Decreased sense of self-worth is a huge problem days, or with herpes, in that many people, after recovering Valacyclovir: 500 mg orally twice a day for three from the initial feeling of betrayal and shock when days they realize they have contracted the disease, move into a state of malaise and inaction. During this Regimens for daily suppressive therapy: time, a redeﬁnition of self can take place, as the individual assigns herself or himself the stigma of Acyclovir: 400 mg orally twice a day, or being “undesirable. In patients who experi- destructive thoughts, as the herpes sufferer experi- ence very severe bouts of herpes or complications ences relationship rebuffs over months and years that make hospitalization necessary (hepatitis, after the disease is contracted. The To combat the feeling of helplessness that often available creams are penciclovir (Denavir) and acy- accompanies this disease, the person with herpes clovir cream. Some have a supportive with infused oxygen to kill the herpesvirus because conﬁdante who helps soothe them during bluesy viruses cannot live in an elevated-oxygen environ- periods; others are comforted by fellow sufferers in ment. In many people point out that episodic antiviral therapy can help to with herpes, the fear of rejection as a result of dis- shorten the duration of lesions and that suppressive closure of herpes is mixed with chagrin and anx- antiviral therapy can help prevent recurrent out- iety. At the same time, herpes sufferers learn, breaks of herpes or render them less frequent and sometimes the hard way, that establishment of an less severe. The ﬁrst year after initial infection is intimate and satisfying relationship must be based marked by the most frequent outbreaks of herpes. Of course, no In succeeding years, most people experience fewer one should feel compelled to reveal personal outbreaks. However, some people have outbreaks health issues to someone with whom he or she is that are frequent and severe for many years. It is important to remember that those rejections Self-Care that follow on the heels of disclosure of herpes Attention to peace of mind is important for those status should be chalked up as “screening,” in dealing with the lifelong stress generated by having that partners who showed little promise for a herpes. Only those who have herpes can fully mutually beneficial, loving long-term relationship understand the burden of dealing with recurrences are eliminated. There usually are ongoing con- measures can help patients cope successfully with cern and worry about transmitting the disease to a this disease. Those who have distress and no conﬁ- partner and about the necessity to have no sexual dante should be encouraged to seek help via hot- activity during active periods of the sores. Because this disease has asympto- matic shedding, it is extremely important for the • Keep the infected area clean and dry to prevent infected person to understand that sexual trans- development of secondary infections. During wash your hands after you do have contact with counseling, a doctor is likely to caution that it is the sores. Consistent use of condoms during sexual ﬁrst have symptoms until complete healing has activity with new or uninfected partners should occurred. This can be deﬁned as the time when be a rule of thumb for those with genital herpes. Periods of latency and activity vary with the Another key fact that should be shared in coun- individual, but it remains unclear what causes seling is the risk of neonatal infection. Some research suggests that women are reluctant to disclose that they have her- friction to the genitals can trigger herpes. Stress, pes when their doctors ask for their gynecologic fatigue, sunlight exposure, and menstruation are history, and it is very important that the doctor who also cited as causes. Condoms give some pro- Research tection, but their overall efficacy in curbing Areas of investigation are focusing on causes of transmission rates is dubious. It is rare (but possible) for genital warts to be transmitted by fomites (any nonliving genital secretion In respect to sexually trans- material such as surgical gloves) and by infected mitted diseases, genital ﬂuids and secretions are mothers to newborns. Left untreated, these can regress, remain genital ulcer Superﬁcial skin ulcerations in the the same, or get larger. It is but this disease usually causes a silent infection, believed that another 60 percent in the same age free of visible symptoms. Genital warts are more than 100 known types, varying in afﬁnity for highly contagious. A reluctance to accept the occur are on the external genitalia or perianal area, inevitable makes some patients refuse treatment, and warts can be seen in the vagina, on the cervix, as if denying that they have genital warts will and inside the urethra and anus. They can occur on Transmission the cervix, vagina, vulva, urethra, perianal area, or Skin-to-skin contact with productive lesions that intraanal region. Natural adults; little is known about the mechanics of inoc- history is unknown, and latent infection probably ulation; two-thirds of partners have disease after accounts for recurrences of infection. In rare instances, genital warts develop in the infection remains latent or subclinical. Genital warts can appear in clusters; they can Genital warts that are untreated may regress, be tiny or spread into large masses. Also, a woman genital warts from fomites or from perinatal or dig- should be diligent about having regular Pap ital transmission (via a person’s ﬁngers or hand). Condyloma acuminata in cauliﬂower shapes, Complications usually on moist surfaces In some rare cases, some infants born to women 2. Papular warts that are dome-shaped, ﬂesh-col- with genital warts have had throat warts (laryngeal ored, smaller than 4 mm, and appear on kera- papillomatosis). They can be life-threatening and tinized skin thus require frequent laser surgery in an effort to 3. Flat-topped papules that are macular or slightly with vulvar cancer, anal cancer, and cancer of the raised and are seen on moist partially kera- penis. The colposcope is used tion of multiple cervical treatments has potential for detecting cervical and vaginal warts. The results of a Pap smear— from the doctor as he or she needs to alleviate anx- the microscopic examination of cells scraped from iety. Depending on the degree eradication of infection, prevention of all seque- of abnormality of the Pap smear result, the patient lae, and elimination of the possibility of transmis- either needs a repeat Pap smear in several months sion to others or of local spread. The treatment or proceeds straight to another test, called a col- can, however, remove visible warts and eliminate poscopy. In colposcopy, a physician is essentially symptoms such as irritation, bleeding, and pruri- looking through an instrument that magniﬁes the tus. He or she can apply lessened serves to reduce the likelihood of trans- 62 genital warts mission to sex partners and to other parts of the Intraepithelial lesions that are moderate- to body.
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